Three-dimensional analysis of a radiant furnace-application to nitric oxide decomposition

Abstract

The objectives of this investigation are to (1) analyze the three-dimensional steady-state fluid flow and temperature patterns in an experimental magnetohydrodynamics (MHD) radiant furnace; (2) use these results, together with a transient three-dimensional tracer simulation, to develop a one-dimensional temperature/flow model for characteristic residence times and temperatures; and (3) use this model to interpret experimental nitric oxide (NO) decomposition data. Calculated results from two three-dimensional thermal hydraulics computer programs indicate highly three-dimensional flow patterns. The high velocity gas stream entering the furnace from the diffuser hits the slag screen and flows downward, splitting into two characteristic flow paths: one close to the slag screen and one much further below it. The gas along these two flow paths then flows upward through the staggered tubes forming the lower section of the slag screen. 17 references.